Thank you.There are some great resources we've put up on the official Shock Value website that might help you:Could you provide an example for internal resistence in a problem?
In particular, the ibiblio book has a section on internal battery resistance: http://www.ibiblio.org/kuphaldt/electri ... DC_11.html
Ohh I see. Thanks Now that I think about it...C would have been the best guess.C. The direction of an electric field is the same as the direction of the force it exerts on a positively charged particle.
If you didn't know that, you should be able to make a pretty good guess from the structure of the question. Notice that A and B are actually the same answer - opposite the direction of a positive charge is the same direction as a negative charge. Since there is only one answer, those two must be incorrect. And D is obviously incorrect, since an electric field will not affect a neutral particle
As an equation, electric field E is equal to force divided by charge, or E=F/q, where F is the force on the particle and q is the charge of the particle. Since we know that positively charged particles have a positive sign, we can tell that both sides of the equation are positive, thus, the direction is the same.
If the particle were negatively charged, q would be negative, and the LHS would have a different sign than the RHS, thus, the direction of the field would be opposite that of the force.
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